Production and reproductive function of intercastes inMyrmecina gvaminicola nipponica colonies (Hymenoptera: Formicidae)
Production and reproductive function of intercastes inMyrmecina gvaminicola nipponica colonies (Hymenoptera: Formicidae)
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Myrmecina gvaminicola nipponica 群体间种的产生和繁殖功能（膜翅目：蚁科）
DOI：
10.1007/bf01338828
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发表时间：
1993
期刊：
影响因子：
1.3
通讯作者：
S. Higashi
中科院分区：
文献类型：
--
作者：
K. Ohkawara;F. Ito;S. Higashi
在最北端的 Myrmecina graminicola nipponica Wheeler 种群中发现了许多形态介于蜂王和工蜂之间的雌性。解剖和形态观察表明，间质分为三类。主要间种级的体型与蜂王一样大，有七个或更多的卵巢，但只有一个单眼，不像蜂王有三个单眼。中型间质具有扩大的中膜、1个或没有单眼以及2至12个卵巢孔。小种姓的外部形态与工蚁非常相似，但与工蚁不同，它有受精囊。受精的女性在大间级、中间级和小间级中分别占75%、40%和28.6%。许多处女中型和小间种的受精囊功能失调。在王后右侧群体中，单个王后受精并具有活跃的卵巢。然而，在跨种姓繁殖的无女王群体中，一些群体在功能上是一夫一妻制，而另一些则是一夫多妻制。一夫多妻群体与一夫一妻群体的比例在七月最低，在九月最高，这表明一夫多妻制是由于新受精的间种留在其出生巢中的结果，尽管它们在群体萌芽季节离开了这些巢。含有受精的间种姓的无女王殖民地只产生间种姓，而有女王权的殖民地几乎只产生女王。
Many females morphologically intermediate between queens and workers were found in a northernmost population ofMyrmecina graminicola nipponicaWheeler. Dissection and morphological observation revealed that there were three categories of intercastes. Major intercastes were as large as queens in body size, with seven or more ovarioles, but had only one ocellus, unlike queens, which had three ocelli. Medium intercasts had an enlarged mesonotum, one or no ocellus and 2 to 12 ovarioles. Minor intercaste was very simlar to workers in external morphology, but had a spermatheca, unlike workers. Inseminated females constituted 75%, 40% and 28.6% in the major, medium and minor intercastes respectively. Many of the virgin medium and minor intercastes had a small disfunctional spermatheca.In queenright colonies, a single queen was inseminated and had an active ovary. In queenless colonies where the intercastes reproduced, however, some colonies were functionally monogynous, but the others polygynous. The ratio of polygynous colonies to monogynous colonies was lowest in July and highest in September, suggesting that polygyny results from newly inseminated intercastes remaining in their natal nests, although they leave those nests in the season of colonial budding. Queenless colonies containing inseminated intercastes exclusively produced intercastes, while queenright colonies almost exclusively produced queens.